Any reports you make are visible to the admins of your instance.
E.g. if you make a report, the community mods may choose to ignore it while your admins choose to remove it for everyone using their instance.
Everything you see on Lemmy is through the eyes of your instance, people of other instances may see different stuff. E.g. some instances censor certain slurs, but that doesn't affect users outside that instance. (de)federations also dictates what comments you will see on a post.